Synthesis of MnO2 nanoparticles from sonochemical reduction of MnO4- in water under different pH conditions

被引：53

作者：

Abulizi, Abulikemu ^{[1
,2
,3
]}

Yang, Guo Hai ^{[2
]}

Okitsu, Kenji ^{[1
]}

Zhu, Jun-Jie ^{[2
]}

机构：

[1] Osaka Prefecture Univ, Grad Sch Engn, Osaka 5998531, Japan

[2] Nanjing Univ, Sch Chem & Chem Engn, State Key Lab Analyt Chem Life Sci, Nanjing 210093, Jiangsu, Peoples R China

[3] Xinjiang Univ, Coll Chem & Chem Engn, Urumqi 830046, Peoples R China

来源：

ULTRASONICS SONOCHEMISTRY | 2014年 / 21卷 / 05期

关键词：

Sonochemical reduction; Permanganate; Manganese dioxide; Effect of pH; ROOM-TEMPERATURE SYNTHESIS; MANGANESE-DIOXIDE; ATOM REACTIONS; ULTRASOUND; SONOLYSIS; DECOMPOSITION; DISSOLUTION; FABRICATION; KINETICS; OXIDES;

D O I：

10.1016/j.ultsonch.2014.03.030

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

MnO2 was synthesized by sonochemical reduction of MnO4- in water under Ar atmosphere at 20 degrees C, where the effects of solution pH on the reduction of MnO4- were investigated. The obtained XRD results showed that poor crystallinity delta- MnO2 was formed at pH 2.2, 6.0 and 9.3. When solution pH was increased from 2.2 to 9.3, the morphologies of delta-MnO2 changed from aggregated sheet-like or needle-like structures to spherical nanoparticles and finally to cubic or polyhedron nanoparticles. After further irradiation, MnO2 was readily reduced to Mn2+. It was confirmed that H2O2 and H atoms formed in the sonolysis of water acted as reductants for both reduction for MnO4- to MnO2 and MnO2 to Mn2+. The optimum irradiation time for the effective synthesis of MnO2 was 13 min at pH 2.2, 9 min at pH 6.0, 8 min at pH 9.3, respectively. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：1629 / 1634

页数：6

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